Car keys have traditionally been treated as something to keep within easy reach. They are often left in a bowl beside the front door, placed on an entry table, hung from a hook in the hallway or dropped onto a kitchen bench after arriving home. That may be convenient, but the growth of electronic vehicle access has changed what secure key storage should look like. A modern car key can be valuable even when a thief cannot physically touch it, particularly if the vehicle uses passive keyless entry and push-button starting.
Some electronic keys continuously communicate with the vehicle so that the doors can unlock when the driver approaches. In certain systems, criminals may attempt to relay that communication between a key inside the home and a car parked outside. The vehicle can then behave as though its authorised key is nearby, allowing it to be opened and, in some cases, started. This type of offence is commonly known as relay theft.
Moving car keys away from doors and windows is a sensible first step, but it should form part of a wider routine. The key needs to be kept out of sight, protected from unwanted electronic communication where appropriate and stored somewhere household members will use consistently. The spare key deserves the same attention, while the vehicle itself should remain locked and supported by additional security where the risk justifies it.
Why The Front Door Is No Longer The Best Place For Car Keys
The front of a home is a natural place to create a key station. It is close to the door, easy to remember and convenient when several people share a vehicle. Unfortunately, it may also place the keys close to the driveway, street, garage or external wall.
There are two separate security concerns. The first is physical access. Keys that can be seen through a window, reached through an open door or located immediately after someone enters the home make the vehicle easier to take. A thief who breaks into a home looking for car keys may spend less time inside if the keys are displayed near the entrance.
The second concern applies to some passive keyless systems. A key stored near a door or driveway-facing window may be close enough for electronic relay equipment outside the property to communicate with it. Moving the key farther into the home may make that more difficult, although distance alone should not be treated as guaranteed protection.
The familiar key bowl does not necessarily need to disappear. It may still be useful for house keys, shed keys and other items that do not transmit a vehicle-access signal. Electronic car keys are better given their own storage location away from external doors, accessible windows and the parked vehicle.
Which Electronic Keys May Be Vulnerable?
The term electronic car key covers several different technologies. A traditional remote-control key normally requires the driver to press a button to lock or unlock the vehicle. A passive keyless-entry fob can usually remain in a pocket or bag while the vehicle detects its presence automatically. Some vehicles also use smartphone-based digital keys, manufacturer apps, key cards or combinations of these systems.
Relay theft is primarily associated with passive keyless entry and passive starting systems. These are the vehicles that allow a driver to touch a door handle, enter and start the engine without pressing a button on the fob. The vehicle and key exchange signals to confirm that the authorised key is nearby.
A remote key with lock and unlock buttons is not necessarily exposed to the same relay method if it remains inactive until a button is pressed. That does not make it immune to every kind of theft, but it means advice about passive keyless fobs should not automatically be applied to every remote key in exactly the same way.
Owners who are unsure what system they have should check the vehicle manual or speak with the manufacturer or dealership. A simple practical indication is whether the doors can be opened and the vehicle started while the key remains untouched in a pocket. The manual may also explain whether passive entry can be disabled, whether the fob enters a sleep mode after being left still and whether any security updates are available.
How Relay Theft Works
A passive keyless vehicle is designed to communicate with its authorised key over a short distance. In a relay attack, criminals attempt to extend or bridge that communication. One device may be positioned near the vehicle while another is brought close enough to detect the key inside the home. The signals are relayed between the two locations, making the vehicle respond as though the key were physically beside it.
The criminal does not necessarily need to enter the home, steal the key or break a window. This is why a vehicle can sometimes disappear without obvious damage being left at the parking location. The absence of a broken window does not prove that relay equipment was used, however, because modern vehicles can also be targeted through stolen keys, fraudulent key programming, diagnostic-system access and other methods.
Relay theft is best understood as one possible weakness rather than the only threat facing a modern car. Protecting the fob is worthwhile, but it does not replace locking the vehicle, securing the home, protecting the diagnostic port where relevant or using a physical immobilising device.
Where To Keep Car Keys At Home
A secure storage location should be away from exterior doors, accessible windows and walls immediately beside the parked vehicle. It should also be out of sight from visitors and from anyone looking through glazing near the entrance.
This does not mean the key must be hidden in an inconvenient corner of the home. A drawer, cupboard or dedicated container in a central part of the house may work well. The location needs to be memorable enough that everyone returns the key after each trip. A theoretically secure hiding place is of little value if people regularly leave the key on a bench because the proper location is difficult to access.
Homes with attached garages deserve particular attention. A key stored beside the internal garage door may still be close to the car, even though it is well away from the front entrance. The same applies to bedrooms, studies or kitchens that share a wall with a driveway or carport.
Distance can vary considerably between properties. A key stored in the centre of a large detached home may be farther from the vehicle than one kept anywhere inside a compact apartment. For susceptible passive-entry fobs, signal-blocking storage offers more dependable protection than relying only on the building’s layout.
Keys should also be kept away from obvious unattended locations such as unlocked drawers in a garage, hooks inside an open carport, outdoor entertaining areas and bags regularly left beside the entrance. Hiding a key immediately beside the door may conceal it from view without meaningfully changing its proximity to the vehicle.
Using A Faraday Pouch Or Signal-Blocking Box
A Faraday pouch or signal-blocking box is designed to prevent radio-frequency communication between the key and the vehicle. When the key is fully enclosed in a functioning product, relay equipment should not be able to obtain the fob’s normal signal.
The key must be placed in the signal-blocking compartment rather than an unshielded outer pocket. Pouches should be properly closed, and boxes should have lids that seal as the manufacturer intends. Leaving part of the fob exposed or failing to close the storage device can reduce its effectiveness.
Products vary in quality, and their condition can change over time. A pouch that worked when new may become less effective after repeated folding, crushing or wear to its lining. It should therefore be tested when purchased and checked periodically rather than assumed to provide permanent protection.
Testing is usually straightforward. Place the key inside the pouch or box, close it completely and take it to the vehicle. Attempt to unlock the car using the normal passive-entry method. If the door opens while the key remains sealed inside, the signal is not being adequately blocked. Depending on the vehicle, it may also be useful to place the enclosed key inside the cabin and check whether the engine recognises it. The vehicle manual should be followed, and the test should be performed safely without leaving the key or vehicle unattended.
Both the everyday key and the spare should be protected. Securing the key used each day while leaving an active spare near the entrance undermines the routine. The same applies when different household members hold separate authorised fobs for the same car.
Improvised containers should be approached cautiously. An ordinary metal tin is not automatically a reliable signal blocker, especially if the lid does not close tightly or the construction leaves gaps. Household appliances are also unsuitable substitutes. A purpose-designed product that can be tested and used consistently is generally more practical.
Can The Keyless Function Be Turned Off?
Some vehicles allow passive entry, the fob’s wireless transmission or both to be switched off when they are not required. The method varies by manufacturer and may involve a sequence of button presses, an option in the vehicle settings or assistance from a dealership.
Other fobs contain motion sensors that place the key into a sleep mode after it has remained still for a period. While asleep, the fob may stop responding to the type of communication used in a relay attack. Moving the key wakes it when the owner picks it up.
These features can improve security, but owners should confirm how their particular vehicle works. It is unwise to assume a fob has entered sleep mode simply because the vehicle is relatively new. Model years, equipment grades and market specifications can differ even within the same vehicle range.
Turning off passive entry may slightly reduce convenience because the driver may need to press a button or use another approved method to unlock the car. For some owners, that is a reasonable trade-off, particularly when the vehicle is parked outdoors overnight or has been identified as a popular theft target.
Remember The Spare Key
Spare keys are often less secure than everyday keys because they are stored and forgotten. A spare may remain in its original box, sit at the back of an entrance drawer or be handed to a family member without any discussion about electronic security.
An authorised spare fob can generally communicate with the vehicle in the same way as the main key. It should therefore be kept away from access points and placed in working signal-blocking storage where relay theft is a concern.
Owners should also know how many keys are currently registered to the vehicle. This is particularly important after buying a second-hand car. If a missing key remains programmed, someone holding it may retain access even though the buyer received the expected number of keys at settlement.
A dealership or qualified automotive locksmith may be able to check the registered keys, remove missing keys from the vehicle’s memory and program replacements. The process depends on the vehicle and should be completed through a reputable provider. A newly purchased used car should also be checked for aftermarket trackers, unfamiliar accessories and unexplained changes to its security system.
Do Not Leave The Key Inside The Car
Keyless starting can make it surprisingly easy to leave the fob in a centre console, door pocket, handbag or jacket inside the vehicle. Some cars will warn the driver or refuse to lock, but these safeguards should not be relied upon in every situation.
A key left inside the car can turn a minor mistake into immediate access. It may also invalidate parts of an insurance claim if the vehicle is stolen in circumstances excluded by the policy. The key should leave the vehicle with the driver even when the car is parked in a private garage.
Garages reduce exposure but do not make key security unnecessary. Garage doors may be left open, remote controls can be stolen and some garages can be entered through internal or side doors. Keeping the car locked and taking the key into the home creates an additional barrier if the garage is accessed.
Check That The Vehicle Has Actually Locked
Electronic locking has encouraged many drivers to walk away after touching a handle or pressing a button without physically checking the result. A confirmation flash or sound can be useful, but the safest habit is to look at the vehicle and confirm that the doors have locked.
Particular care is needed when the key is inside a bag containing other items that may press its buttons. The boot may also remain open or fail to latch even when the passenger doors are locked. After unloading groceries, luggage or equipment, check the boot and doors before leaving the car.
Owners should be wary of simply pressing the lock button repeatedly from inside the home. Doing so may reveal where the key is kept, and it does not confirm that every opening has secured correctly. Locking the car while standing close enough to observe it provides greater certainty.
Car Key Security Also Begins With The House
Signal blocking addresses an electronic risk, but many vehicles are stolen after the keys themselves are taken. Doors, windows and garage access points should therefore be secured as part of the same routine.
Do not display vehicle keys where they can be seen through sidelights, windows or glass doors. Keys should also be beyond the reach of a person attempting to use a tool through a mail slot, pet door, damaged screen or partially opened window.
The correct location should balance car security with personal safety. Keys should not be hidden so thoroughly that household members cannot find them during an emergency. They should also not be placed in a bedroom or other occupied room solely to create a confrontation with an intruder. The aim is to remove easy access and electronic exposure, not to encourage anyone to challenge a person committing a burglary.
Household members should know the agreed storage routine. Teenagers, visitors and relatives may return a borrowed car and leave its key on the nearest bench without realising why the usual storage location matters. A simple, consistent rule is easier to maintain than an elaborate hiding system.
Physical Security Still Has A Place
A steering-wheel lock may appear old-fashioned beside a sophisticated electronic vehicle, but that visibility is part of its value. It creates another obstruction that must be defeated and may encourage a thief to move on to an easier target.
Wheel clamps, secure garage doors, driveway gates and retractable bollards can provide additional physical barriers where appropriate. Their suitability depends on the property, the vehicle, emergency access requirements and how frequently the parking space is used.
Some push-button vehicles can also be targeted through the on-board diagnostic port, commonly known as the OBD port. Criminals may attempt to access the vehicle’s electronics or program another key. A correctly fitted OBD port lock can add protection for vehicles exposed to this method, although compatibility and installation should be checked with a reputable automotive security provider.
An aftermarket immobiliser may offer another layer, particularly for a high-risk model. Any modification should be suitable for the vehicle and professionally installed so that it does not interfere with safety systems, warranties or normal operation.
Parking Position Can Influence The Risk
Where possible, a vehicle should be parked in a locked garage or behind a secure barrier. When that is unavailable, a well-lit position visible from the home may discourage opportunistic interference. Lighting, cameras and doorbell systems can assist with deterrence and evidence, although they do not physically prevent a vehicle from being taken.
Parking very close to the home is not automatically safer for a passive keyless vehicle. If the car sits directly outside the room where its fob is stored, that short separation may make signal protection more important. The solution is not necessarily to move the car to an isolated location, but to protect the key and add suitable vehicle security.
Drivers using shared apartment parking should avoid leaving spare keys in storage cages, mail areas or unsecured communal rooms. A key may be physically closer to the vehicle than expected because the parking level sits directly below the apartment. Signal-blocking storage can be useful where increasing the distance is impractical.
Smartphone Keys Need Their Own Security
Some vehicles can be unlocked or started with a smartphone. These systems vary considerably, but they make phone security part of car security. The device should use a strong passcode or biometric lock, and the owner’s email account, manufacturer account and connected services should be protected with unique passwords and multi-factor authentication where available.
A lost phone should be remotely locked or erased through the relevant device service. Access to the vehicle should be reviewed through the manufacturer’s account, particularly if the phone had been authorised as a digital key.
Digital keys shared with family members, employees or previous users should be removed when access is no longer required. Selling a vehicle, returning a company car or ending a shared arrangement should involve more than handing over the physical fobs. Connected accounts, app permissions and authorised devices may also need to be reset.
Owners should install legitimate vehicle software and app updates because manufacturers may use them to correct faults or improve security. Links received through unexpected messages should be treated cautiously, as a fraudulent login page could expose the account controlling connected vehicle functions.
A Faraday Pouch Does Not Solve Every Form Of Car Theft
Signal-blocking storage is useful for reducing relay risk, but it is not a complete vehicle-security system. It will not stop someone who has stolen the physical key, obtained access to a digital account, forced entry to the car or used another method to interfere with its electronics.
This is why layered security is more reliable than depending on a single product. Secure the house, store every authorised key properly, disable unnecessary wireless functions, lock the vehicle, consider a visible physical device and investigate model-specific weaknesses.
Vehicle owners should be cautious about claims that one pouch, lock or electronic accessory makes a car impossible to steal. Security products can reduce opportunity and increase the work, time and risk involved in an offence, but no everyday measure provides an absolute guarantee.
Review Security When Buying Or Changing Cars
Key storage should be reconsidered whenever a household changes vehicles. A routine developed for an older car with a button-operated remote may be less suitable for a replacement with passive entry. The new vehicle may also have settings or protective features that the previous one did not offer.
Before or shortly after taking delivery, ask how the keyless system works, whether passive entry can be disabled and whether the fob uses motion-sensing sleep technology. Confirm how many keys, cards and digital access methods have been supplied. Read the security and locking sections of the owner’s manual rather than relying only on the brief handover demonstration.
Owners can also ask whether security updates, revised keys or manufacturer-approved accessories are available. Some vehicles may benefit from an OBD lock, additional immobilisation or a tracking system. Advice should be specific to the model because the relevant risks and compatible protections differ.
Creating A Practical Household Routine
The most effective key-security routine is one that happens automatically at the end of every journey. Bring the key inside, place it in its designated signal-blocking pouch or box, close the container and keep it in a secure location away from exterior access points. Check that the car has locked before walking away.
The arrangement should include every authorised key, not only the one used most often. Spare fobs, digital keys, key cards and keys held by other household members should be reviewed together. When access is given to someone new, they should be shown where the key belongs when it is returned.
The pouch or box should be tested periodically and replaced if it stops blocking the signal. Vehicle settings should be reviewed after software updates, servicing or battery replacement, particularly if passive-entry behaviour appears to have changed.
Car key security does not require turning the home into a fortress or hiding the keys in a different place every night. The largest improvement often comes from replacing one exposed habit with a better one. Moving an electronic key away from the front door, enclosing it in a functioning signal blocker and supporting it with basic vehicle and home security can remove an easy opportunity without making everyday driving unnecessarily difficult.
You might also like
Disclaimer: Every effort has been made to ensure the accuracy of the information provided, but we make no guarantees regarding its completeness or reliability. The data is presented for general informational purposes only and does not constitute financial, investment, or legal advice. We are not liable for any errors, omissions, or consequences arising from its use. Users should verify details with relevant sources and seek professional advice where appropriate for the most accurate and up-to-date guidance.
